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Supersized Disk


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This illustration compares the size of a gargantuan star and its surrounding dusty disk (top) to that of our solar system. Monstrous disks like this one were discovered around two "hypergiant" stars by NASA's Spitzer Space Telescope. Astronomers believe these disks might contain the early "seeds" of planets, or possibly leftover debris from planets that already formed. The hypergiant stars, called R 66 and R 126, are located about 170,000 light-years away in our Milky Way's nearest neighbor galaxy, the Large Magellanic Cloud. The stars are about 100 times wider than the sun, or big enough to encompass an orbit equivalent to Earth's. The plump stars are heavy, at 30 and 70 times the mass of the sun, respectively. They are the most massive stars known to sport disks. The disks themselves are also bloated, with masses equal to several Jupiters. The disks begin at a distance approximately 120 times greater than that between Earth and the sun, or 120 astronomical units, and terminate at a distance of about 2,500 astronomical units. Hypergiant stars are the puffed-up, aging descendants of the most massive class of stars, called "O" stars. The stars are so massive that their cores ultimately collapse under their own weight, triggering incredible explosions called supernovae. If any planets circled near the stars during one of these blasts, they would most likely be destroyed. The orbital distances in this picture are plotted on a logarithmic scale. This means that a given distance shown here represents proportionally larger actual distances as you move to the right. The sun and planets in our solar system have been scaled up in size for better viewing.


Mediatype image
Creator NASA/JPL-Caltech/R. Hurt (SSC)
Date 0000
Relation NASA's Spitzer Uncovers Hints of Mega Solar Systems [ http://www.spitzer.caltech.edu/Media/releases/ssc2006-05/release.shtml ]; Rochester Institute of Technology press release [ http://www.rit.edu/~930www/News/viewstory.php3?id=1819 ] A Planet with Planets? Spitzer Finds Cosmic Oddball [ http://www.spitzer.caltech.edu/Media/happenings/20051129/ ]
Insightuid nasaNAS~12~12~64328~168825
Source http://sscws1.ipac.caltech.edu/Imagegallery/image.php?image_name=ssc2006-05b
What Spitzer Space Telescope
What Sun
What Earth
Where Large Magellanic Cloud
Identifier SPITZ-ssc2006-05b
Addeddate 2009-10-06 03:53:31
Publicdate 2009-10-06 06:16:43


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Uploaded by
BonnieReal
on 10/6/2009
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